Onsen OniOnsen Oni

Fishermen’s Shack

舟戸の番屋ふなとのばんや

Public Bathhouse
Kawazu Onsen-goImaihama Onsen
Chubu·Shizuoka
0558-32-0432funadonobanya.web.fc2.com

Day Use

Yes
Mon10:00–17:00
TueClosed
Wed10:00–17:00
Thu10:00–17:00
Fri10:00–17:00
Sat10:00–17:00
Sun10:00–17:00

Adjusted hours during Golden Week, Jul 20 to Aug 31, and the year-end/new-year period. Temporary closures may apply.

¥300

Adults ¥300, children ¥100. Last entry 16:00.

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

OnsenYes

Uses natural hot spring water

Capabilities

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingNo

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

混合泉

Hama Mixed Source

Operated by · 河津町役場

Mixed source

湯
Simple
Color
nearly colorless, transparent
Taste
tasteless
Odor
odorless

Sodium Chloride-Sulfate spring

pH 7.7Weakly alkalineHot source · 64°CHigh silica
Composition fingerprint0.9 g/kg dissolved · Hypotonic
Na⁺79
Ca²⁺16
Cl⁻67
SO₄²⁻23
◀ CationsAnions ▶
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

Sodium-chloride-leaning blended source, but total dissolved solids sit at only 0.881 g/kg so the certificate classifies it as a simple thermal spring — hot category, 64.4 °C at the wellhead. Weakly alkaline (pH 7.7), gentle on the skin, with an unusually generous 116.9 mg/kg of metasilicic acid that leaves a thin silica film and makes the bath read like a textbook Japanese beauty-water source.

Sampled at mixing tank·Analyzed Aug 7, 2017·一般財団法人 静岡県生活科学検査センター·Cert no. 第M17014号

Explore the water

Views

Sea

Highlights

Foot Bath

About

Funado no Banya (舟戸の番屋) is primarily a seafood restaurant on the Izu coast near Kawazu, but its open-air bath is the main draw for many visitors. You climb stone steps from the shore up to the rotenburo (露天風呂), a single outdoor tub sitting right on the clifftop. The water is clear and runs hot, and the view stretches out over Sagami Bay toward the Izu Islands. There is no washing area and soap is not allowed, just a tap for rinsing before you get in. After the bath, the restaurant downstairs does local seafood, including spiny lobster and shellfish.

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SM
Sergey M
1 year ago

203. Fishermen's Shack Public Spa, Kawazu Literally an onsen at a fishermen's shack. You buy a 300 yen pass at the shop, then walk up some stairs and toward the bay to reach the onsen. They stamp the Shizuoka 60+6 Onsen book. No shower, no body wash or shampoo — just a faucet with a hose and a basin tied to it. Found the water composition sign on top of a cabinet. Water in the bath is clear, hot+ temperature. There's some small debris in the bath (like grass and dirt). Great view of the water and the waterfront. If you're in the area, highly recommended. The atmosphere, bath views, and price — all really strong.

SL
Slava
1 year ago

Funado-no-Banya. A 300 yen onsen with a sea view. Moderately hot, very chill. As a bonus, there's a hose with cold water — I gave myself some cold water dousing.

Onsen Oni

Last updated June 25, 2026